作者:Pascal Nösel、Vanessa Müller、Steffen Mader、Setareh Moghimi、Matthias Rudolph、Ingo Braun、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/adsc.201400749
日期:2015.2.9
Abstract1,5‐Diynes bearing halogen‐substituted alkynes were synthesized and converted in the presence of a gold catalyst. In contrast to the corresponding hydroarylating aromatization reaction with terminal alkynes, a totally different reaction mode was observed. Instead of the expected dual catalysis pathway, only one gold center is needed and a 1,2‐halogen migration is initiated in which either a gold vinylidene species or a gold carbenoid is involved. By the incorporation of one solvent molecule, diiodinated aromatic products are obtained in high selectivity.magnified image